Sotjnd-reprodttcing machine



O. H. HANSEN.

SOUND REPRODUCING MACHINE.

APPLICATION FILED JUNE 11, 191B.

Patented Oct. 14, 1919.

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UNITED STATES PATENT OFFICE.

OSWALD H. HANSEN, 03 PORT WASHINGTON. WISCONSIN, ASSIGNOR TO UNITED PHONOGRAPHS CORPORATION, OF SHEBOYGAN, WISCONSIN.

SOUND-REPRODUCING MACHINE.

Specification of Letters Patent.

Patented Oct. 14, 1919.

Application filed June 17, 1918. Serial No. 240,549.

To all whom. it may concern:

Be it known that I, OSWALD H. HANSEN, a citizen of the United States, residing at Port l/Vashington, in the county of Ozaukee and State of Wisconsin, have inventeda certain new and useful Improvement in Sound- Rcproducing Machines, of which the following is a specification.

This invention relates to improvements in the construction and'operation of sound reproducing machines and has particular relation to improvements in driving motors for such machines.

An object of the invention is to provide a sound reproducing machine which is simple in construction and efficient in eperation. Another object of the invention is to provide a driving motor for sound reproducing machines, which is simple durable and compact in construction and extremely silent and frictionless in operation.

In the manufacture of the numerous sound reproducing machines now being commercially exploited, various designs and constructions of driving motors have been dereproduction. The standard form of motor being employed in practically all of the commercially successful machines. COIIIPIISGS, one or more coil springs transmitting power] to a record supporting turn-table through, gearing and an upright main spindle. The speed of the. turn-table is controlled-by a speed-governor of the fly-ball type which is driven through gearingdirectly from the main spindle. The gearing ordinarily employed to transmit motion from the main spindle to the governor is of the worm type, while both spur and worm gearmg are utilized to transmit motion from the springs to the main spindle. The use of worm gearing throughout is however preferred due to the ability of this type of gearing to automatically take up wear thereby eliminating back-lash and also due to the inherent noiseless operation of such gearing. A great fault existing in all of these prior commercial machines is the connection of the speed governor to the main spindle, this arrangement permitting direct transmission of noises and vibration created bv the governor. through the main spindle to the record and the reproducing mechanism.

or worms 6, 7

order to eliminate back-lash, a single worm I wheel driven by the springs, is utilized to drive both the main spindle and the speedgovernor, these elements being associated with diametrically opposite portions of the single worm wheel and being operated in parallel. tion contemplates various other improvements in the construction, of motors for sound reproducing machines which cooperate to produce a highly refined, simple, compact, frictionless and silent machine.

A clear conception of an embodiment of the invention may be had by referring to the drawing accompanying and forming a part of this specification in which like reference characters designate the same or similar parts in the various views.

' Figure 1 is a bottom view of a motor for sound reproducing machines.

Fig. 2 is a side elevation of the motor .looking toward the winding shaft and showing the turn-table and mounting board in section.

The phonograph motor comprises in genera], a source of power or spring motor 14 of ordinary construction associated with a horizontal motor spindle 4 and adapted to deliver energy to a driving member or worm wheel 8 which meshes with driven members vertical parallel main and auxiliary spindles 2, 3. The rotary motion imparted to the worm wheel 8 by the spring motor 14 is thus delivered in parallel to the worms 6, 7 associated with diametrically opposite sides of the worm wheel 8.

The horizontal spindle. 4 of the spring motor 14, is provided with sockets at its ends within which are fitted the pointed ends of set screws 21. forming anti-friction bearings for the spindle 4. One of the adjustable set screws 21 has screw threa coaction with the main bracket 18 while the other has similar coaction with the auxiliary bracket 19. The set screws 21 may be locked in adjusted position relatively to the brackets 18, 19, by

secured respectively to the means of suitable lock nuts. The brackets 18, 19 are secured to the main frame 15 which is detachably secured to the mounting board 16 of the phonograph.

The spring motor 1* is adapted to be energized or wound by means of a hand crank, not shown, applied to the outer threaded end of the-winding shaft 10. The shaft 10 is rotatably mounted in the main frame 15 and bracket 18 and has a spur gear 12 secured to its inner end, which meshes with a spur gear 13 on the motor spindle r. Intermediate the ends of the shaft 10 and adjacent to the main frame 15 is secured a ratchet wheel 23 which coacts with a pivoted pawl 22, this pawl and ratchet being adapted to prevent unwinding of the spring without rotating the worm wheel 8.

The vertical main spindle 2 is provided at its lower extremity with a socket within which is fitted the pointed end of an adjustable set screw 20 which provides an antifriction thrust bearing for the spindle. This set screw 20 has screw thread coaction with a boss on the main bracket 18, and may be locked in adjusted position by means of a lock nut. The main spindle 2 has an upper bearing in the main frame 15 being provided with a thrust collar 17 adj acent. to this bearing. The upper extremity of the main spindle 2 is tapered, the tapered portion being adapted to fit a tapered bore in the record support or turn-table 1.

The vertical auxiliary spindle 3 is provided at its lower extremity with a socket within which is fitted the pointed end of a second adjustable set screw 20 which provides an anti-friction thrust bearing for this spindle. This set screw 20 has screw thread eoaction with a second boss on the main bracket 18, and may be locked in adjusted position by means of a lock nut. The auxiliary spindle 3 has an upper bearing, not shown, in the main frame 15 and has a worm wheel 24 secured thereto adjacent to this bearing. The worm wheel 24 meshes with a worm 9 associated with the horizontal spindle 5 of the speed governor 11. The

overnor spindle 5 is mounted in bearings 1n the main frame 15. The speed governor 11 is of usual construction and is provided with speed control means of usual form, not shown, associated with the governor disk.

Various minor details of construction such as eccentric bearings for the worm carrying spindles, have been omitted as formmg no part of the present invention, and in order to avoid unnecessary complication of the disclosure. The means for braking or stopping the turn-table 1 has also been omit ted as such means are well known to those skilled in the art.

In considering, the operation of the device, let it be assumed that the brake of the turntable 1 is set and that the spring motor 1 is de'elnergized. The motor 1 may then be energized by turning the shaft 10 in a clockwise direction as viewed in Fig. After the motor 14 has been wound, the stored energy may be utilized by releasing the turntable 1, whereupon the spring will rotate the driving member or worm-wheel 8 which will transmit its motion through the worms 6, 7 to the vertical spindles 2, 3 respectively. The rotary motion of the main spindle 2 is transmitted directly to the record support or turn-table 1. The rotary motion of the auxiliary spindle 3 is transmitted to the worm wheel 2% and from thence through the worm 9 to the governor spindle 5 causing the speed governor 11 to rotate. The worm wheel Qatand worm 9 provide speed multiplying means for increasing the speed of rotation of the governor 11 beyond that of the spindle 3, this increased speed of the governor being desirable in order to effect efficient regulation of the speed.

a It will thus be noted that the spring motor 14 delivers its energy through a common worm wheel 8 in parallel to both the turntable 1 and the speed governor 11. The main spindle 2 is entirely free from direct association with any unnecessary mechanism which would tend to transmit noises through this splindle to the turn-table 1. The power connection between the speed governor 11 and the spring motor 1%: while being remote from the main spindle 2, is however maintained relatively near to the motor whose speed is controlled by the governor 11. By employing worm gearing throughout, objectionable noises resulting from back-lash in worn gears, are eliminated. The antifriction bearings for the spindles 2, 3 and 4 reduce to a minimum the friction losses and cooperate with the remaining structure to produce a motor of maximum efliciency.

It should be understood that it is not desired to be limitedto the exact details of construction herein shown and described for various modifications within the scope of the appended claims may occur to persons skilled in the art.

It is claimed and desired to secure by Letters Patent 1. In combination, a source of power, a turn-table, a speed governor, and a pair of gear drives for transmitting motion in parallel from said source to said turn-table and said governor, said drives having at 124 least one gear in common.

2. In combination, a source of power, a turn-table, a speed governor, and a pair of worm drives for transmitting motion in parallel from said source to said turn-table 12: and said governor, said drives having a worm wheel in common.

3. In combination. a source of power, a main spindle, a gear drive comprising driving and driven elements between said source 13 and said spindle, a speed governor, and gearing connecting said governor and said source, said gearing comprising a gear coactin directly with the driving element of said rive.

4.- In combination, a source of wer, a main spindle, a worm drive comprising driving and driven elements between said source and said spindle, a speed governor, and worm gearing connecting said governor and said source, said gearing com rising a gear coacting directly with the riving element of said drive.

5. In'combination, a source of power, a worm wheel driven from said source, a pair of worms coacting withsaid Worm-wheel, a turn-table operatively associated with one of said worms, and a speed-governor operatively associated with the other of said worms.

6. In combination, a power spring, means associated with one end of said spring for storing energy therein, means associated with the opposite end of said spring for delivering energy therefrom, a worm wheel connected to said energy delivery means, worms coacting with opposite portions of said worm wheel, a main spindle 'driven by one of said worms, and a. speed governor driven by the other of said worms.

7. In combination, a spring motor having a spindle, a worm wheel associated with said motor, worms coacting with said worm wheel, a main spindle driven by one of said worms, an auxiliary spindle driven by another of said worms, and anti-friction hearings for all of said spindles.

8. In combination, a source of power, a main gear driven from said source, a pair of auxiliary gears coacting directly with said main gear, a turn-table operative] Y associated with one of said auxiliary gears, and a speed governor operatively associated with the other of said auxiliary gears.

9. In combination, a source of power, a main gear driven from said source, auxiliary gears coacting with diametrically opposite portions of said main gear, a turn-table operatively associated with one of said auxiliary gears, and a speed governor operatively associated with the other of said auxiliary gears.

10. In combination, a spring motor, a worm wheel drivingly connected to said motor, Worms coact-ing with diametrically opposite portions of said worm wheel, a vertical spindle driven by one of said worms, a turn-table connected to said spindle, and a speed governor driven by the other of said worms.

In'testimony whereof, the signature of the inventor is aflixed hereto.

OSWALD H. HANSEN.- 

